存储以用户身份运行的守护进程的 pid 文件
是否有一个首选位置来存储作为用户运行的守护进程的 pid 文件？ /var/run 是标准位置，但这是针对用户守护程序的，因此它在那里没有写权限。大概我的守护进程将从 .profile 或 .bashrc 或其他东西启动。将其保存到 /tmp 是一个坏主意吗？
Is there a preferred place to store a pid file for a daemon that's run as a user? /var/run is the standard place, but this is for a user daemon so it doesn't have write privileges there. Presumably my daemon will be started from .profile or .bashrc or something. Is just saving it to /tmp a bad idea?
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如果它是为用户运行的，让我们看看存在哪种类型的特定于用户的存储。
嗯。
就是这样！主目录。我知道它最终会降临到我身上:-)
抱歉，我的攻击很轻。说真的，我只是将 PID 存储到
$HOME/.daemon.pid或~/.daemon.pid（当然，如何命名文件取决于您） 。当然，这是假设您只为一个用户运行一个守护程序。如果没有，你就需要采取一些技巧。
希望减轻您对用户会无意中删除其主目录中未知文件的担忧，这就是为什么您通过以
.字符开头来将其“隐藏”。大多数没有经验的用户根本不应该看到这些内容，而有经验的用户应该知道不要乱搞它们。
If it's being run for a user, let's see, what sort of storage exists that is user-specific.
Hmmm.
That's it! The home directory. I knew it would come to me eventually :-)
Sorry for the light jab. Seriously, I would just stash the PID into
$HOME/.daemon.pidor~/.daemon.pid(how you name the file is up to you of course).This is, of course, assuming you will only have one daemon running for a user. If not, you'll need to be a bit trickier.
And hopefully allaying your fears that a user will inadvertently delete unknown files in their home directory, that's why you make it "hidden" by starting it with a
.character.Most non-experienced users should never even see these and experienced users should know better than to muck about with them.
XDG Basedir 规范 定义了您应该存储这些内容的位置。
变量
$XDG_RUNTIME_DIR定义其位置，但没有默认值。最常见的后备（如果未设置该变量）是
/tmp/service-$USER.id。这有助于保持主目录整洁，同时将所有运行时数据保存在
The XDG Basedir specification defines where you should store these.
The variable
$XDG_RUNTIME_DIRdefines it's location, although it has no default.The most common fallback (if the variable is unset) is
/tmp/service-$USER.id.This helps keep uncluttered homedirs, while keeping all runtime data in
我建议您转到用户主目录中的子目录。
如果还有任何其他用户配置数据，您也可以将其存储在这里，以避免主目录混乱。
I suggest you go for a subdirectory within the user's home directory.
If there is any other user configuration data, you can store that in here too, in order to avoid cluttering up the home directory.